22 · Diagnostics

Lights not working

Fault diagnosisLights not working

LIGHTS NOT WORKING

When the door/s is/are opened (irrespective of whether the ignition is switched ON or OFF) the courtesy lights do not come on.

1	CHECK INDIVIDUAL LIGHTS	All OK	Problems met	Operation
		Results of the tests
	Check the condition of the individual bulbs	Continue to Step 2	Bulbs damaged	Replace bulbs Op. 7040E24
2	SWITCH CHECK	All OK	Problems met	Operation
	Check the operation of the switches in the locks	Continue to Step 3	Switch faulty	Replace the lock Op. 7005N21
3	CHECKING COURTESY LIGHTS ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check, in order: DRIVER'S DOOR CONNECTOR CONTROL UNIT (services) supply fuse; connections between BODY COMPUTER control unit and door opening switches (locks) connections between NPG CONTROL UNIT AND BODY COMPUTER (LOW SPEED CAN) connections between DRIVER'S DOOR CONNECTOR CONTROL UNIT and courtesy light bulbs; bulb earths: See E2521 COURTESY LIGHTS	Continue to Step 4	Fuse blown	Replace the fuse (and search for the cause of its blowing)
			Connections broken	Restore the connections: See E2521 COURTESY LIGHTS
			Bulb earth faulty	Restore the earth contact: See E2521 COURTESY LIGHTS
4	CORRECT OPERATION CHECK	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

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